fix readme

0xmountaintop · 0xmountaintop · commit 0725199c95d0 · 2019-07-18T08:49:37.000+08:00
diff --git a/README.md b/README.md
@@ -46,7 +46,7 @@ cargo test
 |  #  | Title           |  Solution       |  Time           | Space           | Difficulty    | Tag          | Note| 
 |-----|---------------- | --------------- | --------------- | --------------- | ------------- |--------------|-----|
 0136 | [Single Number](https://leetcode.com/problems/single-number/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number.cpp) <br> [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number.py) <br> [Rust](./kamyu104/src/single_number.rs) | _O(n)_       | _O(1)_          | Easy         |||
-0137 | [Single Number II](https://leetcode.com/problems/single-number-ii/) | [C++](./C++/single-number-ii.cpp) <br> [Python](./Python/single-number-ii.py) | _O(n)_ | _O(1)_          | Medium         |||
+0137 | [Single Number II](https://leetcode.com/problems/single-number-ii/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number-ii.cpp) <br> [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number-ii.py) | _O(n)_ | _O(1)_          | Medium         |||
 
 <!-- 
 0190 | [Reverse Bits](https://leetcode.com/problems/reverse-bits/)  | [C++](./C++/reverse-bits.cpp) [Python](./Python/reverse-bits.py) | _O(1)_        | _O(1)_          | Easy           |||

-Original file line number
+Diff line change
 |  #  | Title           |  Solution       |  Time           | Space           | Difficulty    | Tag          | Note|
 |-----|---------------- | --------------- | --------------- | --------------- | ------------- |--------------|-----|
 | [Single Number](https://leetcode.com/problems/single-number/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number.cpp) <br> [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number.py) <br> [Rust](./kamyu104/src/single_number.rs) | _O(n)_       | _O(1)_          | Easy         |||
 -0137 | [Single Number II](https://leetcode.com/problems/single-number-ii/) | [C++](./C++/single-number-ii.cpp) <br> [Python](./Python/single-number-ii.py) | _O(n)_ | _O(1)_          | Medium         |||
 +0137 | [Single Number II](https://leetcode.com/problems/single-number-ii/) | [C++](https://github.com/kamyu104/LeetCode-Solutions/blob/master/C++/single-number-ii.cpp) <br> [Python](https://github.com/kamyu104/LeetCode-Solutions/blob/master/Python/single-number-ii.py) | _O(n)_ | _O(1)_          | Medium         |||
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